[GHC] #7121: garbage collection invokation, query functions for realtime

[GHC]

#7121: garbage collection invokation, query functions for realtime
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 Reporter:  centaurian_slug   |          Owner:                  
     Type:  feature request   |         Status:  new             
 Priority:  normal            |      Component:  Compiler        
  Version:  7.4.2             |       Keywords:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
  Failure:  None/Unknown      |       Testcase:                  
Blockedby:                    |       Blocking:                  
  Related:                    |  
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 how about a function such as this:-
 invokeGarbageCollector :: IO (int,int)

 which can be called in a "main loop" for interactive realtime application
 to ensure garbage does not build up between frames.
 returning (bytes used,bytes free) would give scope for making
 caching/throttling decisions.
 perhaps further options for passing a number of generations to affect, or
 an allowed amount of memory to move.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7121>
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